package servlet.XMLTree;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Reader;
import java.io.StringReader;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import offer.ConvertToJson;
import offer.GetDataSource;
import offer.GetNodeFromModule;

import org.jdom2.Document;
import org.jdom2.Element;
import org.jdom2.JDOMException;
import org.jdom2.input.SAXBuilder;
import com.netscenery.yang.model.*;

public class LoadTreeServlet extends HttpServlet {

	/**
	 * Constructor of the object.
	 */
	public LoadTreeServlet() {
		super();
	}

	/**
	 * Destruction of the servlet. <br>
	 */
	public void destroy() {
		super.destroy(); // Just puts "destroy" string in log
		// Put your code here
	}

	/**
	 * The doGet method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	@SuppressWarnings("deprecation")
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/json; charset=utf-8");
		request.setCharacterEncoding("utf-8");
		response.setHeader("Cache-Control","no-cache"); 
		String   nodeLevel    =  request.getParameter("nodeId");   //ͨ������������ҽ��
		String[] levels       =  nodeLevel.split("\\\\");
		PrintWriter out = response.getWriter();
		Module treeModule =      GetDataSource.getDataRead(request);
		
		ConvertToJson toJson = null;
		//��ڵ��
		String jsonStr = null;
		if("Module".equalsIgnoreCase(nodeLevel)){
			toJson = new ConvertToJson(treeModule);
			jsonStr = toJson.getModuleTree();
		}else{
			ConvertToJson json = new ConvertToJson();
			DataDefElement itemNode = GetNodeFromModule.getDataDefByLervels(treeModule, levels);
			String levelStr = "";
			for(int i = 0 ; i < levels.length ; i++){
				levelStr += levels[i];
				if(i != levels.length -1){
					levelStr += "\\\\";
				}
			}
			if (itemNode instanceof Node){
				jsonStr = json.getChilds((Node) itemNode, levelStr);
			}
			
		}
		
		
		out.write(jsonStr);
		out.flush();
		out.close();
	}
	/**
	 * The doPost method of the servlet. <br>
	 *
	 * This method is called when a form has its tag value method equals to post.
	 * 
	 * @param request the request send by the client to the server
	 * @param response the response send by the server to the client
	 * @throws ServletException if an error occurred
	 * @throws IOException if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		response.setContentType("text/html");
		PrintWriter out = response.getWriter();
		out
				.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
		out.println("<HTML>");
		out.println("  <HEAD><TITLE>A Servlet</TITLE></HEAD>");
		out.println("  <BODY>");
		out.print("    This is ");
		out.print(this.getClass());
		out.println(", using the POST method");
		out.println("  </BODY>");
		out.println("</HTML>");
		out.flush();
		out.close();
	}

	/**
	 * Initialization of the servlet. <br>
	 *
	 * @throws ServletException if an error occurs
	 */
	public void init() throws ServletException {
		// Put your code here
	}

}
